map is:exact -package:vector -package:base-compat -package:blaze-html -package:bytestring -package:Cabal-syntax -package:aeson -package:basement -package:case-insensitive -package:base-compat-batteries -package:base-prelude -package:incipit-base package:monoidal-containers
O(n) Transform this map by applying a function to every value.